Finishing-machine.



B. F. STOWELL.

FINISHING MACHINE.

APPLICATION FILED JUNE II. 1917 Patented Apr. 22, 1919.

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B. F. STOWELL.

FINISHING MACHINE.

APPLICATION FILED JUNE 1|, 1911.

1,301,1 90;, Patented Apr. 22, 1919. 3 SHEETs-SHEETB.

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finds one rinrrnin sra'rns PATENT onnion BYRON F. STOWELL, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO BARNEY 8c BERRY, INQ, OF SPRINGFIELD, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

FINISHING-MACHINE.

Patented Apr. 22, 1919.

Application filed .Tune 11, 1917. Srial'No. 174,135.

To all whom it may concern:

Be it known thatI, Brnon F. STOWELL, a citizen of the United States of America, re siding at Springfield, in the county of Hampden and State of Massachuetts, have invented certainnew and useful Improvements in Finishing-,Machines, of which the following is a specification.

This invention relates to finishing machines and more particularly to finishing machines of the swing frame type. While the invention is capable of general application, it is particularly advantageous for and preferred specific use in polishing machines.

Heretofore, finishing machines of the swing frame type have generally not been provided With means for guiding the polishing wheel in a definite path. The general practice has been merelyto counterweight th horizontal swinging arm on which the finishing wheel. is mounted, and the pressure of the wheel upon the work has been obtained manually by the operator which, on

account of its non-uniform tendency is not conducive to accurate finishing, particularly with flat surfaces. Other grinding and pol ishing machines have been provided with a reciprocatory wheel movable in slides or ways, but, so far as I amaware, these slides are located in the path of the flying abrasive dust from the finishing wheel, and are there fore exposed to injury and rapid wear. Another difiiculty heretofore encountered with swing frame grinders arises from the tendency of the traction of the finishing wheel on the work to produce jump 7 or chatter marks in the work which results in an undesirable, uneven, and inferior polished surface. For example, slightirregularities in the finishing wheel or a wheel which is slightly out of true produces a non-uniform traction on the .work and tends to pull the wheel along the'work faster than it is reciprocated by the automatic mechanism so that instead of a substantially uniform travel, the travel may be made up of a series of sudden rcciprocations or jumps. This invention is concerned among other things with the elimination of these disadvantages.

An object of the invention is to provide in a finishing machine an arm carrying atone end a suitable finishing wheel, means pivotally connected with the other end of the army to reciprocate the latter, and a motor arranged to drive the Wheel, which motor is reclprocable with said arm and arranged by its inertia to stabilize the motion of the latter without tending to lift the arm or the finishing wheel thereon.

Another object of the invention is to provide in a finishing machine improved guiding means for a reciprocable polishing wheel, said means consisting of spaced tracks lo- .cated below the wheel spindle and relatively heavy rolls mounted on the latter and engageable with the tracks to support the wheel, the construction being characterized in that the guiding means, although located adjacent the polishing wheel, are not susceptible to injury by abrasive dust from the wheel and in that the rolls by their weight and location function to steady the motion of the wheel and prevent chattering.

A further object of the invention is to provide in a finishing machine, a work loading apparatus, wherein work to be finished may be assembled on a movable work support while other work on another movable worl: support is being polished, the arrangement being such that the work supports may be rapidly interchanged at the end of the finishing operation, whereby the machine may operate with a minimum loss of time.

Other objects and advantages will appear in the following description and will be particularly pointed out in the appended claims.

The invention, in an embodiment at present preferred, is shown for illustrative purposes in the accompanying drawings, in which Figure 1 is a side elevational view of the polishing machine;

Fig. 2 is a fragmentary sectional plan view taken on the line 22 of Fig. 1;

Fig. 3 is a front elevational view with parts broken away;

i Fig. 4 is a fragmentary plan view illustrativeof adjustable guiding tracks for the polishing wheel;

Fig. 5 is a detail elevational view taken on the line 5-5 of Fig. 3;

Fig. 6 is a plan view of an article which may be polished in the machine;

Fig, 7 is a front elevational view of the loading table unit of the machine;

Fig. 8 is a sectional plan view taken on the line 88 of Fig. 7;

Fig. 9 is a fragmentary cross sectional view taken on the line 9 of Fig. 3 and illustrating the reversible feeding mechanism for the traveling work table; and

Fig. 10 is a fragmentary sectional elevation taken on the line 1010 of Fig. 9.

Referring to these drawings, in detail; A represents the main frame of the machine, which may dvantageously be built up from structural shapes into the form shown. Fixed in spaced parallel relation to frame A near the forward part thereof are a pair of tracks 15, which as shown inv Fig. 3, extend longitudinally from one end of the frame to the other. A suitable carriage 16 (Figs. 1 and is provided with a pair of axles 17 and mounted on each axle are a pair of flanged rolls 18 which are adapted to roll on tracks 15, the flanges of the rolls being arranged to engage the inner edges of the tracks to prevent lateral displacement of carriage 16. Fixed in spaced parallel relation to the top of carriage 16 are a pair of tracks 19 which extend in a direction at right angles to the described tracks 15. A suitable magnetic chuck 20, upon which the work to be polished is mounted, is provided with wheels 21 which support the chuck for rolling engagement with the trackways 19 as best shown in Fig. 3.

The chuck 20 may be of any suitable type, such as the well known electro-magnetic chuck, and detailed illustration and description of the chuck is thought unnecessary to an understanding of the invention since such chucks are now well known in the art. The chuck 20 is movably mounted in the machine so that it may be conveniently removed and replaced in a manner later to be described. 111 order to hold the chuck in position on tracks 19, a stop 22 (Fig. 1) is fixed to each track against which stop the rear wheels of the carriage abut, and a dog 23 is pivoted to the front of chuck 20, which dog is adapted to be swung into the position shown in Fig. 1 to engage the surface 24 of carriage 16.

Fixed centrally to each side face of the latter is an arm 25 and the outer ends of the two arms 25 are connected together by a rack 26 which extends parallel with and centrally between the described tracks 15. Mounted in frame A below rack 26 and at right angles thereto (Figs. 3, 9-, and 10) is a hollow shaft 27 and fixed to the shaft is a gear 28 which meshes with the rack. Shaft 27 may be turned manually, when desired, by a hand wheel 29 fixed to the forward end of the shaft. Extending through the hollow shaft 27 is a rod 30 which isprovided at its forward end with a knob 31, whereby it may be moved axiallly to and fro in shaft 27. Rod 30 extends rearwardly beyond the end of sleeve 27 and fixed to the rod adjacent the rear end of the sleeve is a clutch element32. Loosely mounted on sleeve 2.7 is a ratchet wheel 33 upon the rear face of which is a clutch element 34: adapted to engage the element 32 when rod 30 is pulled forwardly, as

shown in Fig. 9. Ratchet 33 is arranged to be turned step by step by automatic mechanism to be described but may be turned manually by hand wheel 29 by pushing rod 30 inwardly sufliciently to disengage the clutch element 32 from the element 31 on the ratchet wheel. 7

Loosely mounted on clutch element 3% adjacent ratchet 33 is; a lever 35 and at tachedto the end of the latter by the universal joint shown in Fig. .10 is a rod 36 which, asshownin Fig. 3, extends upwardly and is connectedby a similar universal joint to a crank pin. 37. The latter is adjustably mounted in a slot 38 ofa crank disk 39, as

best shown in Fig. 5. Disk 39 is fixed to a shaft 40 which is suitably supported from frame A and may bedriven from a suitable source of power by a pulley 41. Referring to. Fig. 10,.a double pawl 42 is pivoted intermediate its ends to lever 35 and either pawl may be caused to engage the ratchet 33, as will later appear, whereby as the driving shaft 10 is continuously rotated the hollow shaft 27 will be turned intermittently to move carriage 16 step by step. along the tracks 15.

Automatic means are provided whereby the carriage 16,. after having been moved step by step a definite distance in one direction, may be reversed and caused to travel in the opposite direction to its starting point, which means will now be described with reference to Fig. '10; Pivoted intermediate its ends to frame A at 43' is a lever 44 which has at one end a slot 45. A lever 16 pivoted at 17 to frame A has at one end an angularly bent upper portion which engages in slot 4:5. The other end of lever 2E6 is forked and mounted on each of the two forked ends is a finger 18. Pivoted at 4:9 to the described lever 35 is an arm 50, one end of which extends beyond lever 35 and travels between the fingers 18. A semi-elliptic spring 51 is secured centrally to the other end of arm 50, and the free ends of the spring bear on the ends of the described double pawl 42.

lVith the parts in the relative positions illustrated, the lever 35 has reached the end of its upward stroke and is about to swing downwardly. The lever ll is sopositioned that the upper finger 18 on lever 46 is. held out of the path of the arm 50, but the lower finger 4:8 is so positioned that, as the lever 35 nears the end of its downward stroke, arm 50 engages with the finger and is moved upwardly thereby. This causes the upper portion of spring 51 to be compressed against the upper part of pawl 42 to force it into engagement with the ratchet 33. Immediately as the lever 35 starts its upward movement, the pressure of the pawl on the ratchet teeth holds the former inengagement with the latter, so that although the pressure of spring 51 on the pawl is relaxed as soon as arm 50 leaves lower finger 48, the pawl remains in engagement with the ratchet. As soon as lever 35 commences its descent from the position illustrated, the pressure'of the pawl on the ratchet teeth is relaxed and the pressure of spring 51, having been previously relaxed as described, the pawl automatically moves out of engagement with the ratchet, so that the latter is not turned on a downward stroke of lever 35.

The upper finger 48 functionsisimilarly to move the lower part of the pawl 42 into engagement with the ratchet at the end of each upward stroke of lever 35, provided it is lowered so as to hem the path of arm 50. This lowering movement of the upper finger 48 is accomplished by raising lever 44, and

lower finger 48 is simultaneously lowered beyond the path of arm 50. Thus the motion of ratchet 33 maybe reversedto cause the carriage to travel to the right insteadof in the direction illustrated. Lever 44 is automatically moved at the end of the travel of the carriage in one direction-to set fingers 48 so that the carriage will travel in the other direction. Secured to the left end of lever 44 is a cam 53, which is adapted to be engaged by a pin 54 projecting rearwardly' from carriage 16. The engagement of pin 54 with cam 53 causes the right hand end of lever 44 to be elevated, and lever 46 is moved to position fingers 48 so that the ratchet is turned in a direction opposite from that illustrated, whereby the carriage will move to the right. Near the end of thetravel of carriage 16 to the right a pin 55 projecting forwardly from lever 44 near-the right hand end thereof is engaged by a cam 56 which is secured to the rear of the carriage. Cam

56 forces pin 55 downwardly to move lever.

44 into the position illustrated.

Thus carriage 16 may be automatically moved to and fro through as many cycles of operation as is desired. The travel of the carriage may be varied by moving cam 56, which as shown is adjustably secured to the carriage. The degree ofthestep by step increments of the carriage may be varied by altering the position of the crank pin 37 (Fig. 5) and fingers 48 are made adjustable on lever 46, by means not shown, to compensate for variations in the position of the crank pin. a

Referring to Figs. 1 and 3, above the carriage 16 area pair of spaced parallel channel irons 60, which are fixed at their rear ends to frame A. The forward ends of the channels 60 are supported from frame A by struts 61 (shown as broken off in Figs. 1 and 3) which are suitably ofi'set as indicated in Fig.1 to permit the projecting tracks 19 to freely pass as carriage 16 is moved along its trackways. Slidably mounted upon the upper face of each channel 60, in the manner best shown in Fig. 4, is an angle iron 62 and secured to the latter is a member 63 which is interiorly threaded to receive a threaded rod 64. The latter is rotatably supported in a bracket attached to channel 60 and is provided with a suitable handle, whereby it may be turned to move member 62. Each of the latter is formed with two inclined surfaces 65 upon each of which a grooved roll 66 is adapted to ride. Each roll 66 is rotatably mounted in the upper end of a bracket 67 which may be clamped to a channel 60 by a pair of handle nuts 68 and suitable bolts which pass through a slot 69 in the bracket. The pair of brackets 67 on each channel 60 are arranged to support tracks 70, which in the embodiment illustrated consist of T-irons mounted for lateral adjustment (Fig. 4) on the brackets. It will be obvious that, by loosening nuts 68 and turning the threaded rod 64 by the handle provided, the cams 65 may be so moved as to simultaneously raise the front and rear ends of each track uniformly, so that the tracks may be raised or lowered with rela-.

tion to the carriage and at the same time maintained parallel. therewith. If it is desired to-have the tracks 70 positioned in inclined relation to carriage 16, as when tapered work is to be polished, this may be accomplished by manually raising either the front or rear pair of brackets 67 independently of the cams 65. In order that each track 70 may be raised to the same level, each threaded rod 64 is provided with a graduated dial 71, which may be read with relation to a pointer 72 secured to the supporting bracket for the rod. Thus, each rod 64 may be readily turned an equal amount by means of the dial 71 and pointer 72 so that both tracks may be raised an equal amount.

The polishing wheel, indicated at 73, is mounted on a shaft 74 and loosely mounted on the ends of the latter are grooved rolls 75 which ride upon tracks 7 0 and form bearings for the shaft. The shaft 74 loosely passes through the forked forward end of an arm 76 and intermediate the forked forward ends of the arm is a driving pulley 77, which is directly connected by a belt 78 to an electric motor 79. The rear end of arm 76 is also forked and is loosely mounted on the shaft 80 of the motor. The latter is bolted to the lower end of a swinging frame 81 pivotally mounted on a shaft 82 which is rotatably supported from the upper rear part of frame A. Frame 81'is connected by a link 83 to a crank pin 84,which is adjustable ina slot 85 in a crank disk 86 secured to the described drive shaft 40. It will be seen that frame 81 may be reciprocated and that the degree of reciprocation may be varied by altering the position of pin 84 in slot 85. Thus, arm 76, pivotally connected to the motor shaft 80, is moved to and fro to reciprocate the polishing wheel 73 across the magnetic chuck 20.

The wheel 73 may be reciprocatedeither in a straight line or in a curved path, as desired. here curved articles, such as the skate blade 6 (Fig. 6.). are to be polished, it is preferable to move the wheel in a curved path, such as indicated by the line 29. To accomplish this result, a guide 87 is. secured to the side face of each pair of the described brackets 67 (see Fig. Each guide 8.7 is formed with a cam surface 88 (Fig. 1) of the desired curvature, the distance between the two surfaces 88 being constant and equal to. the length of the shaft 74 of the polishing wheel. The motor 7 9 is secured to frame 81, as shown in Fig. 2, by bolts 89 and a central pivot 90. The bolts 89 pass through arcuate slots 91 in frame 81 so. that, when they are slightly loosened, the motor may swing on the pivot 90. The ends of shaft 74 ride on cam surfaces 88 and during the reciproca tion of the polishing wheel cause lateral movements of the latter, whereby the wheel may be moved in a curved path. When the wheel 7 3 is to be moved in a straight line path, the guides 88 are removed, and each track 70 is moved laterally to bear against the outer flange of its wheel 75. Collars are fixed to spindle 74 to prevent endwise movement of wheels 75 in one direction and endwise movement in the other direction is prevented by the track 7 0 when it is positioned as just described. The motor bolts 89 may then be tightened, and a subsequent reciprocation of arm 78 will cause the wheel 73 to move in a straight line path. When the guides 87 are used, wheels 75 may float inwardly towagrd wheel 73 without causing trouble since the lateral guiding of the polishing wheel is effected by the guides 87.

Associated with the polishing machine is a loading table, which is arranged at the forward left hand end of frame A. The loading table appears in side elevation in Fig. 1,

attached at one end to the lower bars 96 on frame 93, the other ends of the cables being secured to weights 97 to counterbalance the frame 93. Pivotally connected at 98 to a part of the latter (Fig. 7 is a link 99 and a latch arm 100}. The link, at its lower end, is pivotally connected to one end of a bent acumen:

lever 101 which fulcrums intermediate its ends on thefloor- By depressing the treadle portion of lever 101,.frame 93 may be raised into the position iiliustrated. As the frame 93: is elevated, the latch arm. 1. 0.0 isv drawn to the left (:Fig. 7) by a spring 102 so that shoulder 1103: on the arm overlies a diagonal Frame 93 is provided with upper and lower sets of tracks 105 and 106; respectively. The tracks 105 are arranged onthe same level as tracks 19 of carriage.16v when frame 93 is in its: lower position, and tracks 10.6- are arranged on the: same level as tracks 19 when frame 93 is; in its upper position. After-the work on the chuck 20, which is positioned in carriage 16, has. been finished, the latter is. moved either automatically or by hand as already described until the tracks 19 aline with the. tracks 106, which as shown. in Fig. 1 are in their elevated position. The dog 23 is then swung upwardly after which the chuck 20 may be rolled onto tracks 106. The. dog 23 is thereafter swung downwardly to engage the front edge of frame 93, as. illustrated in Fig. 1 with the chuck 2.0 on tracks 105. The forward end of tracks 105 and 106' have stops 107 against which one pair of wheels 21 abut so that the dog 2.3 and stops 107 cooperate to hold the chuck against movement on its: tracks either direction. The frame 9.3 may then be lowered as described so that tracks 1.05 will salinewith tracks 19, and a Second. chuck 20, which has previously been loaded with work to be polished, is rolled onto the latter and held in position by the dog 2.3 in the manner already described. ,While the. work on one chuck is being polished the finished work on the other chuck may be removed, and other work to be polished may be. assembled on the last-named chuck, so that as. soon as the work on the first chuck is completed the second chuck may be quickly substituted therefor. Thus, the polishing machine is practically continuous in operation and can thereby be operated much more. efficiently than if the loading table arrangement were not provided. The chuck 20 is provided with a suitable electrical connection 109 which, may be readily attached to and de tached from a source of electricity, such as, a lamp socket on a flexible cord, for example.

In operation, a chuck 20 having thereon work to be polished, such. as articles I), for example, isv positioned on carriage 16 and power is applied to pulley 41. The height of tracks .70 is adjusted in the described manner to bring the wheel 73 into the desired vertical position above the carriage. The latter is then moved back and forth by suitable step by step increments while wheel 73 is reciprocated in-a direction transverse to that of the travel of the carriage. Wheel 73 is separately driven at high speed by the motor 79. The tracks 7 0 may be lowered slightly from time to time, when necessary, as for example, after each reciprocation of the carriage, and the latter is moved to and fro until the work on chuck 20 has been polished to the desired degree. The chuck may then be removed and replaced by another chuck after which the described operations are repeated.

A feature of the invention of particular importance is the arrangement of the guiding means for the polishing wheel. By

the use of rolls riding upon tracks, the-guiding means may be located closely adjacent the polishing wheel, without causing trouble from the presence of falling and flying abrasive dust. The rolls are purposely made relatively heavy and their weight plus that of the polishing wheel is sufficient to hold the rolls to the tracks and give the necessary pressure upon the work. As distinguished from slides movable between upper and lower guides, the rolling support is yieldable vertically if slight obstructions in the work are encountered by the wheel or ifthe wheel itself has slight irregularities therein. Slides when used in the presence of abrasive dust are objectionable in that they are subjected to rapid wear and soon fail to accurately guide the wheel, but the presence of abrasive dust on the tracks 7 0 causes little wear since the members 75 roll thereon and whatever wear takes place may be compensated for by slightly raisingthe tracks by turning rods 7 4. Not only do the rolls 75 function in part to hold the wheel 73 against the work, but they also function by reason of their'location on the wheel spindle and their weight to stabilize the motion of the wheel and prevent jumping of the latter with the consequent jump marks and other imperfections in the finished product. The rolls 75 also function as bearings to rotatably support the shaft 74 of the polishing wheel.

Another important and advantageous feature of the construction described is the arrangement of the motor for driving the polishing wheel. very high speeds, and it will be obvious that, by locating the motor as illustrated, only one fast traveling belt is needed. The relatively large number of shafts, pulleys, and fast traveling belts which would be necessary if the motor were not located on the reciprocating arm are thus eliminated. The more important advantage, which follows from the location of the motor on the pivotal The latter must rotate "a connection between arm 76 and frame 81, consists inthe stabilizing effect produced on the reciprocating arms. The relatively heavy motor applied at or adjacent the described pivot point, acts by its inertia to prevent sudden jumps in the reciprocation of the polishing wheel. The latter act on the work like any wheel on a track and tends of itself by tractive action to progress along the work. With a wheel of regular contour the traction of the wheel on the work is uniform, but, when there are irregularities in the wheel or when the wheel is the least bit out of true as frequently happens, the tractive effect is non-uniform throughout the rotation of the wheel. Thus, there is a tendency for the wheel to jump along the work when an irregularity in the wheel engages the work, and it is for the purpose of counteracting this tendency that the motor is so located. The motor may be located at any point adjacent the pivotal connection 80 to obtain this effect, except that it should not be located to the rear of the pivot in such a manner that its weight bears on arm 76, for then the useful effect of the inertia of the motor on the arm would be counteracted by the tendency to raise the forward end of the lever and thus lift the wheel from the work. The described arrangement, however, is preferred on account of simplicity since the motor drive shaft functions also as the pivotal connection and also on account of the fact that all the inertia of the motor is available on arm without either adding to or subtracting from the pressure of the polishing wheel on the work.

It is also to be particularly noted that the wheel 7 3 may be guided in various ways by the tracks 70 and guides 87 together with their adjusting means to meet varying conditions. Thus, flat work may be polished by moving the wheel either in curved paths or in a straight line path depending upon whether or not guides 87 are used. The conformation of surfaces 88 may be varied as desired to obtain variations in the curved path p. Tracks 7 0 maybe uniformly raised and lowered by accurate known increments by means of rods 64: and their dials 71 or each track maybe manually raised at one end if it is desired to polish tapered articles.

The loading table arrangement is also of particular importance in combination with a machine of the character described, since the machine may be kept working practically continuously. The arrangement whereby work may be assembled on one chuck while other work on another chuck is being polished is thus of considerable prac tical importance in the art since it makes for continuity of operation of the machine.

The invention has been disclosed for illustrative purposes in form at present port for work: toibe finished, spaced tracks;

preferred, but the scopeof the invention is defined by the appended claims rather than by the-foregoing description.

WVhatI claim is- 1-. A finishing machine, comprising, a support for work to be finished, an arm, a finishing Wheel mounted in: one end thereof and: adapted to engage the work, means pivotally' connected with the other end of said arm: to reciprocate the latter, and a motor'reciproca'ble with said: arm and connectedtothe wheel to drive-the latter, said motor beinggsorlocatedthat its Weight is distributed equally" on opposite. sides of the pivotal connectiontoh said arm, whereby its inertia may act toastabil-ize the reciprocable motion? of the arm: and wheel: Without tending to lift .therlatt'er from the work.

2. A; finishing machine, comprising, asapport forwork to be finished, an arm, a finishing Wheel=-n1ounted in one end thereof, means pivotally connected: tothe other end 0t. said arm to' reciprocate the latter, and a motor the driving shaft ofwhich constitutes the pivotal connection between said means and: arm; and is connected to said wheel to drivetthelatter, said motor being arranged by its- Weight ands, loeation to stabilize the reeiprocable motion of said arm: Without tending: to lift the latter.

3-.- A finishingmachine, comprising, asuparranged-above the suppornfla spindle, a finishir-rg. whee-l: thereon, hearings torotatably support the endszof the spindle and con structed to roll on said tracks, means to rotate saidspindle, andmeans to :reciprocate the latter over the work to be finished, characterized that: the bearings act also as guiding and supportin-grollers and by their Weight and location tend. t'o prevent chatter-- ing and vibration of said.- Wheel.

4. A1 finishing-machine, comprising, asupport for?" work: to be finished, spaced tracks arranged above the support, a spindle, a1

finishing wheel thereon,-. relatively heavy supportmgbearings for the ends of the spindle and arranged oneoneach side of said Wheel, SELICl bGEUI'IHgS bel-ng'mounted to rolladirectly OIISillld track, means'to rotate said? spindle and means to reciprocate" the latter: over-the work to befinished, all construct'ed and arranged so that the rolling Copies ofi-cth is patent mayfbeobtained for-fivecents each, lay-addressing; the Commissioner of Patents;

bearings support and guide the wheel in its reciprocatory movement and tend to prevent jumping and vibratory movements of the Wheel;

5. A finishing machine, comprising, a support for Work to be finished, spaced track- Ways arranged above saidsupport, a spindle, a finishing Wheel thereon, rollers on said spindle adjacent the ends thereof and arranged to roll on said tracks and support the: spindle, means to reciprocate said wheel and spindle, and meansto rotate the latter at a speed relatively high with relation to=its reciprocating movement.

G. A finishing machine-comprising; a support for work' to be finished, spaced track- W'ays arranged above saidlsapport, a-spindle, a finishing Wheel thereon, rollers on said spindle adjacentthe ends thereof andar= rangedto roll on said tracks, meansto reciprocate said wheel and spindle, means to rotate thelatter, and means to raise-or lower said tracks with relation to' said Work support, said means constructed and arranged to simultaneously and? uniformly move each endiof the tracks.

7. A. finishing machine, comprising, a support for work to be-fin-ished, spaced? trackwaysarranged above said support, aspindle; a finishing wheel' thereon,- rollers on said spindle adjacent the ends thereof, and arranged to roll on said traeks means to ree cipro'cate's'aid wheel and spindle, means to rotate the latter, and means' t'OlIfllSB or lower? saidtrackswith relation'to said Work sup port, said means constructed and arranged sothat eaclr end of a track maybe simultaneously anduniformly moved and so that one end maybe moved; independently 'ofthe other when desired.

8. A finishingmachine; comprising, a support for" work to be finished, spaced tracks arranged. above. the support, aspindle, a finishing Wheel thereon, supporting bean ings for each end of' the spindleeonstructed toroll on SELId tI'ZLGkS, means to rotate saidspindle, means to reciprocate the: latter over the work tobe finished, and; gmding'means to positively move said'wheelaxiallyin'bothr path.

BYRON F. STGWEEL,

Washington, ID. 01" 

